source file: m1425.txt Date: Sun, 24 May 1998 07:45:57 -0500 Subject: Harmonic Spectrums/Organ Drawbar Registrations From: "Benjamin Tubb" I have Steven Irwins' book "Dictionary of Hammond Organ Stops: A Translation of Pipe-Organ Stops Into Hammond-Organ Number Arrangements" which I would like to further supplement with other similar books for experiments in additive synthesis. Does anyone have an approach to how to modify such instruments for non-12tet tuning spectrums? For example, given the following 11-drawbar pitch definitions for four representative instruments of the Foundation, Flute, Reed, and String families: 00 3525 010 10 Cathedral Diapason 8' 00 1401 001 10 Bell Flute 8' 00 7070 011 11 Clarinet 8' 00 1511 111 11 Orchestral Violin 8' [Where the drawbar positions correspond to harmonic amplitudes within a range from 0 to 9 for the following pitches: 16', 5 1/3', 8', 4', 2 2/3', 2', 1 3/5', 1 1/3', 1', 1 1/7' + 8/9', and 4/5' + 2/3'. There harmonics thus represented when the fundamental is considered the 3rd drawbar are 1,2,3,4, 5,6,8, Septieme+Nonieme, and Tierce+Quint.] How would one adapt such registrations for "common" 5 or 7-limit Just Intonation? ------------- Benjamin Tubb AIM: brtubb ICQ: 650264 brtubb@cybertron.com http://home.cybertron.com/~brtubb